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Distribution ofVibrio cholerae in two Florida estuaries.

M A Hood1, G E Ness, G E Rodrick

  • 1Department of Biology, University of West Florida, 32504, Pensacola, Florida, USA.

Microbial Ecology
|November 14, 2013
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Summary

Vibrio cholerae, particularly non-O1 serotypes, is widespread in Florida estuaries like Apalachicola and Tampa Bay. Optimal growth occurs in warm waters with salinities between 10‰-25‰.

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Area of Science:

  • Environmental microbiology
  • Marine biology
  • Bacteriology

Background:

  • Vibrio cholerae is a significant human pathogen.
  • Understanding its environmental distribution is crucial for public health.
  • Florida estuaries are ecologically and economically important ecosystems.

Purpose of the Study:

  • To investigate the distribution and prevalence of Vibrio cholerae serotypes in two Florida estuaries.
  • To identify environmental factors influencing Vibrio cholerae distribution.
  • To determine optimal conditions for Vibrio cholerae growth.

Main Methods:

  • Sampling of oysters, sediments, water, and blue crabs from Apalachicola and Tampa Bay.
  • Isolation and serotyping of Vibrio cholerae strains.
  • Analysis of physical and chemical parameters (temperature, salinity).
  • In vitro growth curve analysis of environmental isolates.

Main Results:

  • Vibrio cholerae non-O1 was the predominant serotype, found in oysters, sediments, water, and blue crabs.
  • Vibrio cholerae O1 was rarely detected.
  • No strong linear correlations were found with physical/chemical parameters or indicator bacteria.
  • Optimal salinity range for Vibrio cholerae growth was 10‰-25‰, with temperatures between 20°C-35°C.

Conclusions:

  • Vibrio cholerae is widely distributed in nutrient-rich, warm waters of Gulf Coast estuaries.
  • Environmental conditions, particularly salinity and temperature, play a role in its distribution.
  • Non-O1 serotypes are more prevalent in these estuarine environments.